Adding-machine.



No. 689,447. Patontd Dec. 24, IQDI.,I

F. A. WURDEN.

ADDING MACHINE.

(Applicntinn led Apr. 28, 1900.) (Ilo Model.)

' UNITED STATES PATENT OFFICE.

FRANK A. VORDEN, OFl YPSILANTI, MICHIGAN.

ADQINGEMACHINE.

' SPECIFICATION formingl part of Letters Patent No. 689,447, datedDecember 24, 1901.

Application iiled April 26, 17900. Serial No. 14,371. (No model.)

To' all whom it may concern.-

.Be it known thatLFRANK A. WORDEN, a citizen of the United States,residing at Ypsilanti, in the county ofv Washtenaw and State ofMichigan, have invented certain'new and useful Improvements inAdding-Machines, of which the following is a specitication,'refy erencebeing had therein to the accompanying drawings.

The invention consists in the construction of an adding-machine, andparticularly in the construction and arrangement of the adding-wheelsand of the carrying mechanism, and. infthe construction, arrangement,and combination of the various parts, all as more fully hereinafterdescribed. v In the drawings, Figure l is a plan View of my improvedadding-machine, the top of the tens e wheel being cut off to lshow theratchet and carrying mechanism beneath. Fig. 2 is a perspective view ofthe tenswheel, showing the carrying mechanism in position to carry. Fig.3 is a vertical section through v:is

one of the posts or pins uponwhich the register-wheel and the ratchetare carried.

The parts are shown as supported upon a base-plate A. Arranged in acircular line along the edge of this plateare a series of vertical postsor pins B. At the top of each pin is a cap C, which in this case I haveshown of sheet metal of substantially umbrella shape with a centralcylindrical socket D engaging over and by means of which the cap issecured to the post by any suitable meanssuch, for instance, as brazingor welding. Around the edge of this cap are marked in consecutive orderfigures indicating the digits, as plainly shown in Figs. 1 and 2. At thepoint where the cipher-sign would be on the plate is an aperturey D',through which the figures on the register-wheel E beneath may be seen.These figures are preferably the digits and a cipher and correspond tofigures upon the outside of the cap C. The register-wheel E, Ipreferably make of sheet metal of shape complementary to that of the capC and havingthe horizontal flange a ex- Y tending out beyond the edge ofthe cap and provided with theapertures b, one aperture opposite'eachfigure. This register-Wheel is secured to the top of a sleeve F, whichis journaled upon the pin B. 'At the lower end this finger H, whichpreferably projects sleeve carries a ratchet-wheel G and a carrierbeyondtheratchet-wheel, as shown. y

I represents back'stop-pawls which are in tended to prevent theregister-wheels from turning in the wrong direction and are piv- V otedon the base-plate Anand engage with the ratchet-wheel, as plainly shownin Fig. 1.

. .I represents a'series of arms extending radially from the lowerportion of the plate into proximity to the carrying-wheels, one for eachwheel above the units-wheel. These arms .I are pivoted upon thebase-plate, and each is actuated by a spring L and held normally againsta stop M in the position shown. At the outer end each arm carries a pawlc, extending into engagement with the ratchetwheel, and has a portion orbracket d extending into the pathof the carrying-finger H of theratchet-wheels.

In order to operate this device, the proceeding is as follows: Supposethat six units are to be added. The operator inserts a stylus or thepoint of a pencil in the aperture in the flange a of the register-wheelwhich is opposite the number 6 upon the cap C and then turns that wheeluntil it registers with the stop O on the cap, which stop is placedbetween the f 9 and the cipher-mark on the cap. number will be exposedthrough the aperture D in the cap. Supposing that the machine started atzero, the igure 6 will be exposed through this aperture. Now if six moreare to be added the operator repeats the operation described and theiigure 2 will be exposed through the aperture D in the Aunitswheel. y Inorder to carry to the tens-wheel during the second movement described,the carrying-finger H on the units-wheel will strike the bracket orprojection d on the tenscarrying arm and will rock that'arm about itspivot and through the engagement of the pawl c with the ratchet-wheel onthe tensregisterwheel will move that register-wheel `one notch.

This will add six units, and the desired IOO lost motion between thevarious wheels at the carrying-point and also the preventing of thepossibility of a Wheel of lower denomination being turned upon theoperation of a wheel of higher denomination. In order to insure a propercarrying without lost motion, I arrange the carrying-finger I-I in suchrelation to the carrying-arm .I or the bracket thereon that when thestylus is brought to a stop against the stop O when the 9 is exhibitedthe carrying-iinger H is directly in contact with the bearing or fingerupon the arm J and preferably so that the spring L of thecarrying-finger is under tension slightly, so that it will hold theratchet-wheel in direct `engagement with the pawl c of the carryingarm.The position of these parts at the car- 4 rying period is shown in Fig.2, and it will be seen that the spring of the arm J in that positionthrough the projection d and the carrying-finger H is holding theratchet-wheel G directly against the pawl c of the next lowercarrying-arm. In this instance the machine is shown as capable ofregistering up to nine for instance, to the sum given-one million andone.

In order to insure the positive engagement of the carrying mechanism asdescribed, I may and preferably do arrange a stop O a triiie beyond theposition necessary to eifect any registration, so that the stylus willmove the necessary distance and a slight distance beyond. Thisoverthrow, however, is only necessary at the carrying-point, and I maytherefore accomplish it by arranging the aperture d, which is beside thezero-mark on the register, slightly out of its true position, so as toeffect this overthrow only when the stylus is inserted in thisparticular aperture.

I deem it desirable to arrange my register- Wheels in the circular linedescribed because it makes the machine very compact and enables me toarrange the carrying-arms .I on radial lines which may easily be' struckfrom the center, and also because it enables me to group the wheels insuch position as to actuate it with the least possible movement and in aposition which it is natural for the hand to travel.

It will be seen from the description given that nearly all the parts maybe made from sheet metal stamped into the desired configuration, andthus that the machine is an extremely simple one besides beingabsolutely correct in carrying, no matter how many of the wheels arebeing used as carrying-wheels at any one time.

What I claim as my invention is 1. In an adding-machine,the combinationof a series of register-wheels adapted to be actuated by a stylusengaging bearings in the wheel, a rachet-wheel secured to eachaddingwheel, a carrying-finger, a carrying-arm for each wheel above theunits, a pawl thereon, a stop for the stylus, and means for causing thewheel to slightly overtravel whenmoved into position for carrryingwhereby the highest wheel of a number carrying simultaneously, will bethe first to complete its movement and to release its carrying-arm, andthe lowest of the series will be the last.

2. In an adding-machine, the combination with a series ofregister-wheels, of a plurality of transfer mechanisms respectivelyarranged between adjacent register-wheels each being adapted whenactuated to slightly overcarry the wheel of higher denomination and thento disengage therefrom, whereby the highest wheel of a number carriedsimultaneously will be the first to complete its movement and disengagefrom its transfer mechanism.

3. In an adding-machine, the combination with a series ofregister-wheels, of .a plurality of transfer mechanisms respectivelyarranged between adjacent register-wheels,each comprising a carrying-flnger connected to the wheel of lower denomination, a ratchetwheelconnected to the register-wheel of higher denomination, and anintermediate pivotal carrying-arm having a portion extending into thepath of said finger, and a pawl extending into engagement with saidratchetwheel,said transfer mechanism being adapted to slightly multiplythe angular movement of the higher wheel, and to overcarry the samebefore disengagement of the actuating carrying-finger from saidcarrying-arm whereby the highest wheel of a number carriedsimultaneously will be the first to be disengaged; and means forreturning said register-wheels the amount of their overmovement afterdisengagement from the transfer mechanism.

4. In an adding-machine, a register-wheel comprising a marginal portionhaving bearings for the engagement of a stylus, and an inclined figuredportion within said marginal portion.

5. In an adding-machine, a register-wheel comprising a marginal portionhaving bearings for the engagement of astylus, and a central dome-shapedfigured portion.

6. In an adding-machine, a register-wheel comprising a marginal portionhaving bearings for engagement of a stylus, a central dome-shapedfigured portion and similarlyshaped stationary cap covering saiddomeshaped portion being apertured to expose one of the figures thereon,and having an outwardly-projecting portion forming a stop for thestylus.

7. In an adding-machine, a register-wheel formed of sheet metal having,a horizontal l said tubular portion ami a marginal portion marginalportion having bearings for a stylus thereon, a downwardly-projectingperipheral ange, a dome-shaped central gured portion and acentrally-depending sleeve forming a journal for the Wheel.

8. In an adding-machine, the combination with a base of a stationary pinprojecting therefrom, a register-Wheel sleeved upon said pin comprisinga tubular journal, a domeshaped gured portion at the upper end of havingbearings for a stylus; and a stationary cap of similar dome shape havingan up wardly-projecting tubular portion secured upon the upper end ofsaid. stationary pin.

In testimony whereof I aix my signature in presence of two witnesses. n

' FRANK A. WORDEN. Witnesses:

DAVID R. MoRoRD, FRANK WHITMAN.

